#538C74
Closest named color: Slate Green (#658D6D). oklch(59.4% 0.071 165.4), rgb(83, 140, 116).
Aa
Black text reads best on this color (5.37:1).
About this color
#538C74 is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.071 and its hue 165°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.022 away. Black text reads best on it, at 5.37:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.071) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.37:1 |
| White text | 3.90:1 |
Values
| HEX | #538C74 |
| RGB | rgb(83, 140, 116) |
| HSL | hsl(155, 26%, 44%) |
| OKLCH | oklch(59.4% 0.071 165.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #538C74 | 3.90:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #538C74 | 5.37:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #538C74 text on white | 3.90:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #538C74 text on black | 5.37:1 | AA | Lc -35.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECE8
oklch(93.6% 0.01 164.9)
-
Step 200
200
#CEDDD6
oklch(88.4% 0.019 166.3)
-
Step 300
300
#ADC8BB
oklch(80.9% 0.034 164.9)
-
Step 400
400
#80AC98
oklch(70.7% 0.056 165.2)
-
Step 500
500 (this color)
#538C74
oklch(59.4% 0.071 165.4)
-
Step 600
600
#438268
oklch(55.7% 0.078 164.9)
-
Step 700
700
#346E57
oklch(49.2% 0.072 165.4)
-
Step 800
800
#2C5947
oklch(42.6% 0.059 165.6)
-
Step 900
900
#284A3C
oklch(37.8% 0.047 165.7)
-
Step 950
950
#182B23
oklch(27% 0.029 165.8)
#538C74 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #8A8573 | 0.071 |
| Deuteranopia (no green cones) | #807E75 | 0.067 |
| Tritanopia (no blue cones) | #448C85 | 0.027 |
| Achromatopsia (no color) | #818181 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538C74
#538C74
oklch(59.4% 0.071 165.4)
- #9D6D88
#9D6D88
oklch(59.3% 0.071 344.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #538C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.022
- Dusty Teal #4C9085 ΔE 0.024
- Dark Sage #598556 ΔE 0.040
- Ocean Green #3D9973 ΔE 0.042
- Viridian #1E9167 ΔE 0.048
- Sea #3C9992 ΔE 0.048
- Green Grey #77926F ΔE 0.048
- Grey Teal #5E9B8A ΔE 0.051
Use #538C74 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.